# Colorimetric detection of hg(Ii) ion using silver nanoparticles capped with 3-hydroxybenzoic acid
> Gusrizal G.

URL kanonis: https://discover.unhas.ac.id/publications/pub_scopus_85071441261
Jurnal / Konferensi: Molekul
Tahun terbit: 2019
DOI: https://doi.org/10.20884/1.jm.2019.14.1.460
ISSN: 19079761
Kuartil SJR: Q4
Citations: 4

## Authors
- Gusrizal G.

## Abstract
In this paper, we report for the first time thesimple method for detection of Hg(II) ion in anaqueousmedium using silver nanoparticles capped with 3-hydroxybenzoic acid. Silver nanoparticles capped with 3-hydroxybenzoic acid were preparedby reduction of the silver ion with 3-hydroxybenzoic acid and without surface functionalization. The formation of silver nanoparticles was characterized by a UV-Visible spectrophotometer. The yellowcolloid of prepared silver nanoparticles capped with 3-hydroxybenzoic acid showed a surface plasmon resonance peak at 420 nm. The ability of silver nanoparticles capped with 3-hydroxybenzoic acid in detection was tested by doing a reaction with several metal ions individually(Na(I), K(I), Cu(II), Zn(II), Ca(II), Mg(II), Hg(II), Mn(II), Ni(II), Pb(II), and Co(II)). It was foundthat silver nanoparticles capped with 3-hydroxybenzoic acid highly selective toHg(II) and then the prepared silver nanoparticles were developedfor detection of Hg(II) ion. Addition of 1 mL Hg(II) ion into 4mL the as-preparedsilver nanoparticles reducedthe peak of surface plasmon resonance spectra, andthe reduction of peak intensity was proportional to the concentration of Hg(II) ion. A goodlinear relationship (R2= 0.998) between absorbance at 420 nm and concentrationof Hg(II) over the range 1.0x10-3to 5.5x10-3M was obtained. Silver nanoparticles capped with 3-hydroxybenzoic acid were highly sensitive to Hg (II) ion with the detection limit down to 4.7x10-5M. Application the method to the real water sample showed the excellentresult with recovery ranged from 98 to 101%. The proposed method was found to be useful forthe colorimetric detection of Hg(II) ion in an aqueousmedium.

## Keywords
- Silver nanoparticle
- Hydroxybenzoic acid
- Surface plasmon resonance
- Absorbance
- Nanoparticle
- Chemistry
- Detection limit
- Nuclear chemistry
- Ion
- Analytical Chemistry (journal)
- Inorganic chemistry
- Materials science
- Chromatography
- Nanotechnology
- Organic chemistry

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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